Ubuntu 22.04
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MicroK8s : Enable Prometheus2022/09/02

Enable Prometheus add-on to monitor metrics on MicroK8s Cluster.
[1] Enable built-in Prometheus add-on on primary Node.
microk8s enable prometheus dashboard dns

Infer repository core for addon prometheus
Infer repository core for addon dashboard
Infer repository core for addon dns
Adding argument --authentication-token-webhook to nodes.
Configuring node
Restarting nodes.
Configuring node
Infer repository core for addon dns
Addon core/dns is already enabled
Fetching kube-prometheus version v0.8.0.


service/prometheus-k8s created
serviceaccount/prometheus-k8s created
servicemonitor.monitoring.coreos.com/prometheus-k8s created
The Prometheus operator is enabled (user/pass: admin/admin)
Addon core/dashboard is already enabled
Addon core/dns is already enabled

microk8s kubectl get services -n monitoring

NAME                    TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)                      AGE
prometheus-operator     ClusterIP   None             <none>        8443/TCP                     2m2s
alertmanager-main       ClusterIP    <none>        9093/TCP                     118s
blackbox-exporter       ClusterIP   <none>        9115/TCP,19115/TCP           118s
grafana                 ClusterIP    <none>        3000/TCP                     117s
kube-state-metrics      ClusterIP   None             <none>        8443/TCP,9443/TCP            117s
node-exporter           ClusterIP   None             <none>        9100/TCP                     117s
prometheus-adapter      ClusterIP    <none>        443/TCP                      117s
prometheus-k8s          ClusterIP   <none>        9090/TCP                     116s
alertmanager-operated   ClusterIP   None             <none>        9093/TCP,9094/TCP,9094/UDP   53s
prometheus-operated     ClusterIP   None             <none>        9090/TCP                     52s

microk8s kubectl get pods -n monitoring

NAME                                   READY   STATUS    RESTARTS      AGE
prometheus-adapter-85455b9f55-jd8q2    1/1     Running   0             2m4s
node-exporter-pknj4                    2/2     Running   0             2m4s
grafana-789464df6b-svscm               1/1     Running   0             2m4s
prometheus-operator-65cdb77c59-76gs8   2/2     Running   0             2m4s
prometheus-adapter-85455b9f55-v4pm7    1/1     Running   0             2m4s
blackbox-exporter-84c68b59b8-8hrvz     3/3     Running   0             2m4s
node-exporter-g48jm                    2/2     Running   0             2m4s
kube-state-metrics-55b87f58f6-bqzgk    3/3     Running   0             2m4s
alertmanager-main-0                    2/2     Running   0             113s
prometheus-k8s-0                       2/2     Running   1 (83s ago)   112s

# set port-forwarding to enable external access if you need
# Prometheus UI

microk8s kubectl port-forward -n monitoring service/prometheus-k8s --address 9090:9090

Forwarding from -> 9090
# Grafana UI

microk8s kubectl port-forward -n monitoring service/grafana --address 3000:3000

Forwarding from -> 3000
[2] Access to [https://(MicroK8s primary node's Hostname or IP address):(setting port)] with an web browser on a Client computer in local network. Then, that's OK if following Prometheus or Grafana UI is shown.
For default user/password on Grafana, it [admin/admin].
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